Add Email and Country Blacklisting

[elmiomar]

Overview

This PR introduces functionality to automatically reject record creation requests in the createRecord() method when the user's email or country is blacklisted.

Changes

• Implemented new isEmailBlacklisted() and isCountryBlacklisted() methods to check if the user's email or country is in the blacklist.
• Blacklist validation is the first thing we do in createRecord(). This ensures that requests with blacklisted emails or countries are rejected right away, which prevents unnecessary processing and resource utilization on entries that will ultimately be automatically rejected.
• Added logging to record when a request is rejected due to blacklisting.
• Updated unit tests to cover scenarios where the email or country is blacklisted.

Testing

• Updated existing unit tests to cover the new blacklisting checks.
• e2e testing with oar-docker to ensure that blacklisted emails and countries are correctly identified and rejected.

Please review the changes and provide your feedback.

[RayPlante]

Note: this was not merge directly, but rather indirectly via #106